The MCL for chloride is established at?

The maximum contaminant level (MCL) for chloride is established at 250 mg/l. This level is set based on health considerations related to the effects of chloride on drinking water quality and the potential impact on human health. Chloride itself is not highly toxic; however, elevated concentrations can affect the taste of water and can indicate the presence of other contaminants. The MCL of 250 mg/l aims to ensure that drinking water remains palatable and safe for consumption, while also helping to protect aquatic life in the receiving water bodies. Establishing a clear standard allows water treatment facilities to monitor and manage chloride levels, contributing to overall water quality and safety for consumers.

The other values presented in the choices are not reflective of the established MCL for chloride according to regulatory standards, which is why they are not correct.